Circuit tightening mechanism of charging pile

The utility model relates to the technical field of charging piles, in particular to a line tightening mechanism of a charging pile, which comprises the charging pile and a take-up sleeve fixedly arranged on the charging pile, sliding inner grooves are symmetrically and fixedly arranged on two sides of the inside of the take-up sleeve, a lower convex block is fixedly arranged at the lower end of the outside of the take-up sleeve, an insertion hole is formed in the lower convex block, and the line tightening mechanism is arranged in the insertion hole. The plug hole penetrates into the take-up sleeve, a wire groove is formed in the upper end of a sleeve opening of the take-up sleeve, a charging gun plug bush is fixedly arranged on the portion, on the upper side of the take-up sleeve, of the charging pile, a charging wire is stored on the take-up column, meanwhile, the take-up column is retracted into the take-up sleeve, the charging wire can be protected, and in addition, when the take-up column moves into the